持枪歹徒用人质作人体盾牌。
科学家们对于人体使用酶疗法持谨慎态度。
The scientists are cautious about using enzyme therapy on humans.
该疗法只有在动物身上证明安全、万无一失后才会在人体上试用。
The treatment will be tried out on human beings only after it has been shown to be safe and foolproof in animals.
多亏有了光纤，如今才能够照见人体中许多最微小的器官和最暗的腔体。
Thanks to fibre optics, it is now possible to illuminate many of the body's remotest organs and darkest orifices.
那些宇航员正在进行一系列实验，以便更多地了解人体如何适应失重状态。
The astronauts are conducting a series of experiments to learn more about how the body adapts to weightlessness.
这水平并不对人体健康构成立即的威胁。
The levels do not pose any immediate danger to human health.
针灸师可能会说，人体有800多个穴位。
Acupuncturists may say that the body has more than 800 acupuncture points.
玉米中含有维生素烟酸，但不以人体可吸收的形式存在。
Maize contains the vitamin niacin, but not in a form the body can absorb.
限制人体体能表现的因素之一是肌肉从血液中吸收的氧气量。
One of the limiting factors in human physical performance is the amount of oxygen that is absorbed by the muscles from the bloodstream.
在分离的人体细胞中，这种抗体被证明对遏制鼻病毒非常有效。
In isolated human cells, this antibody proved to be extraordinarily effective at thwarting the rhinovirus.
成千上万甚至上百万的微型机器可被送入人体执行特定的任务。
Thousands or even millions of tiny machines can be sent into the human body with specific tasks.
古典希腊雕像代表了理想化的人体，这在当时被认为是相当美丽的。
Classical Greek statues represented an idealization of the human body and were considered quite beautiful at the time.
由于农业发展不是处于一个封闭环境中，因此它和人体医学有所不同。
Agriculture differs from the medical science of the human body in that its environment is not a contained one.
由于苯酚对人体有刺激性作用，它基本上已不再被当作常用的防腐剂了。
Because of its irritating effect on humans, the use of phenol as a general antiseptic has been largely discontinued.
饱和脂肪被人体用来制造胆固醇，而高浓度的胆固醇与心脏病直接相关。
Saturated fats are used by the body to make cholesterol, and high levels of cholesterol have since been directly related to heart disease.
为了使一种化学物质被认为是一种药物，它必须具有影响人体运作的能力。
In order for a chemical to be considered a drug, it must have the capacity to affect how the body works.
BBC新闻指出，人体会受到能产生“幸福感”的天然化学物质的影响。
The human body is influenced by natural chemicals that produce "a sense of happiness", noted BBC News.
关于社区成员之间饮食变化的信息是通过分析人体骨骼中的微量元素得到的。
Information about dietary variation among community members is derived by analyzing trace elements in human bone.
饱和脂肪被人体用来制造胆固醇，而高水平的胆固醇自此与心脏病直接相关。
Saturated fats are used by the body to make cholesterol, and high levels of cholesterol has since been directly related to heart disease.
除非你对狼蛛毒素过敏，否则它们对人体是无害的（尽管它们咬你一口会很痛）。
Unless you are allergic to tarantula venom, they are harmless to humans (though they pack a painful bite).
最重要的是，香蕉能提供人体所需的不同东西！香蕉在温暖多雨的地方生长得最好。
Best of all, bananas provide different things that the human body needs! Bananas grow best in warm places that get lots of rain.
这种天使般的激光慢慢地开始了一个渐进的过程，将贞洁的人体转化为灵魂的精髓。
This angelic laser begins slowly the gradual process of transforming the virginal human body to the essence of the soul itself.
他解释说，人体的编程是在日出时开始一天的工作。随着白天变短，这一过程会变晚。
The body is programmed to start the day with sunrise, he explains, and this gets later as the days get shorter.
他们封锁道路，负责架设长达25英里的人体屏障，并在一个广阔的区域内实施停车管制令。
They blocked roads, set up 25-mile human barriers, and enforced parking control orders over a wide area.
戈德法布博士称，人体每小时最多只能吸收大约一夸脱水，如果超过这个限度，大脑就会危险地膨胀。
The human body can absorb no more than about a quart of water per hour, beyond which the brain can swell dangerously, says Dr. Goldfarb.
他富有魅力，待人体贴，举止无可挑剔。
受感染的蚊子叮人时，孢子就被注入人体血液。
When an infected mosquito bites a human, spores are injected into the blood.
赞德拉是位36岁却有着21岁人体格的运动型人。
Xandra is an athletic 36-year-old with a 21-year-old's body.
冠状病毒在人体内会引起呼吸道感染疾病。
In humans, coronaviruses cause respiratory tract infections.
这些微型机器人在病人体内的细胞之间移动，摧毁癌细胞。
These tiny robots move from cell to cell in the patient's body, destroying the cancer cells.
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